A $28-$mm$-$diameter shaft is pulled through a cylindrical bearing as shown in the figure below. The lubricant that fills the $0\mathrm{.}3-$mm gap between the shaft and bearing is an oil having a kinematic viscosity of $8\mathrm{.}0{10}^{-4}\frac{m^2}{s}$ and a specific gravity of $0\mathrm{.}91.$ Determine the force P required to pull the shaft at a velocity of $6\frac{m}{s}.$ Assume the velocity distribution in the gap is linear.

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